Hi!

Ive been trying to learn how to calculate the clo value in a down jacket.
I dont need 100% spot on value but if i could get within ~0.3 clo of the actual clo value
then i would be happy. I think i got a way to do it but im not sure if its the right way.

Here is how i do it with the numbers for 800fp down:

Patagonia Fitz Roy Hoody:

Richard.N says that it has a clo value of 3.94.
ive read that it has 181grams of down.
800fp down is 45.93g/1,62oz/clo in densitys betwen 1,62oz/yd2/in3 and 4,05oz/yd2/in3.

181/45.93 = Clo 3,94.
Seems right.

Eddie Bauer peak XV:

Richard.N says that it has a clo value of 7.47.

Here is how i do it: 12,76 oz/361,7g of down and 2.5inch loft.
361.7/2,5 = 144,7g/inch of loft. 147,7-115 = 29,7. 29,7/5,11 = 5,81.
1,0581*45,93 = 48,59. 361,7/48,59 = clo7,44.
Not 100% spot on but close enough for me, could be that i use 800fp numbers and the jacket has 850fp.

Feathered friends Rock and Ice parka:
Richard.N says it has a clo value of 11,98

Here is how i do it:
size M = 582g of down. im guessing it has 4" baffle height from pictures ive seen.
582/4 = 145,5. 145,5-115= 30,5. 30,5/5,11=5,96.
1,0596*45,93 = 48,66. 582/48,66 = clo 11,96.
Again close but not 100%

Using this method seems to work just fine, but i only know this because i can compare my results to Richard's results. I own a Wolff-Wear -50 Expedition jacket, it has 800g(!) of 800fp down in size M, 4" baffles.
800/4 = 200. 200-115 = 85. 85/5,11= 16,6.
1,166*45,93= 53,55. 800/53,55 = Clo 14,93.

Can someone tell me if a clo value of 14,93 seems reasonable for this jacket?

Thank You!

Sorry for my bad english but i hope you can understand.

/Rob

This looks like a real bargain for a super warm down jacket (at least with their catalog specs) for $202 (without VAT). I don't know if they ship to the USA, but they give prices in US$. http://www.wolff-wear.se/down-jackets/expedition-down-jacket-50grc.html

On paper at least, it should be warmer than the FF Rock and Ice for 1/4 the price. If you buy one you should write a review. Sorry, I don't know the clo.

Hi!

I already own the jacket and i love it. Its a verry warm jacket and i dont doubt the -50c temp rating. 2 layers of down must be the ultimate construction for warmth. The filling is verry dense and the jacket can "stand" on its own. Its the perfect jacket for beeing inactive in verry cold weather. The downside is that its almost to puffy, you look like the michelin man. The shell is a heavier nylon, much thicker than the one on the Peak XV jacket for example but it dosnt have a rip-stop element in the shell. I dont think this jacket likes rain and wet snow either.
Its heavy! must weigh atleast 4lbs. It only has 2 cargo pockets and 2 handwarmer pockets on the outside. The inside has one large zipperd pocket, I would have liked if they had put a waterbottle pocket to.
Other than that its a great jacket, and its cheap, atleast here in Sweden.

-50 C?

= -58 F

Where does it get that cold?

Definitely a "Michelin Man"

I would so love to see a picture of that coat ;)

Couldn't find one with anyone wearing it, but this is from their website.